Overseam sewing-machine.



A. A. MERRITT & G. H. NOBLE.

OVBRSEAM SEWING MACHINE. APPLICATION 11.21) JAN.14,-1909.

Patented Aug. 16, 1910.

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ATTORNEYS .A. A. MfiRmTT'ah can. NOBLE.

OVERSEAM SEWING MACHINE; A-PPLIIOATIOK FILED JAN. 14. 1909. 967,804, Patented Aug. 16, 1910.

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ATTORNEYS UNITED sT TEs PATENT oFFIcEQ ARTHUR A. MERRITT, OF WORCESTER, MASSACHUSETTS, nn eEORoE H. NOBLE, OE

PROVIDENCE, RHODE ISLAND, ASSIGNORS TO WILLCOXAND-GIBBS SEWING MA- CHINE COMPANY, OF NEW YORK, N; Y., A CORPORATION OF NEW HYORK.

OVERSEAM SEWING-MACHINE.

.fication.

' 3 :This invention relates to overseam sewing which a reciprocating eye-pointed needle is combined with two thread-carrying loopers to form an ovcrseam stitch of the button-' hole stitch character out of three threads.

. The main object of the invention is to construct an overscamer of simple construction adapted to do work of this character at high speed.

In the accompanying drawings this invention is shown as embodied in an overseam sewing machine of the same general construction as those illustrated in the \Villcox and Berton Patents April 5th, 1892.

Figure 1 is a vertical sectional view of sufficient of the executive elements and frame of the machine to illustrate the invention; Figs. 2, 3, and 4 are views showing the same executive elements in successive po sitions in the formation of the stitch; Fig. 5 is a vertical section in a plane at right angles to the section, Fig. 1, hut showing the moving parts in the position, Fig. 4; Fig. 6 is a diagram illustrating the paths of movement of the needle and looper parts; Figs. 7 and 8 are enlarged views of the loopcrs.

In these views, A is the-bed plate of the machine, and a, Fig. 5, is the driving shaft carrying eccentrics or cams to impart motion to all the moving parts. Thus in Fig. 5, the shaft a carries an eccentric 6 having its eccentric strap and link 6 pivotally connected to the needle arm E, which oscillates about amtixetl center 7. The outer end of this needflearm E carries the usual curved eyepointedneedle 10. In this machine the 'loop-.

ing means cooperating with this reciprocatingneedle 10 to form the overseam stitches N es. 4 72,091 and 472,095,

Specification of Letters Patent.

Application filed January 14, 1909. Serial No. 472,286.

Patented Aug. 16, 1 910,

consist of two pivoted looper elements having their operative ends traveling in parallel planes diagonal to the line of the needles movement, but describing two curved paths around the edgeof the cloth C, those curved paths intersecting each other in such a way that the first looper element may pass its loop of thread through the loops of thread carried by the needle when the latter is below the cloth, and subsequently the second looper intersecting the path of the first looper after the latter has passed partly around. the edge of the cloth, will pass the second looper thread through the first looper thread ant (thereafter) into the path of the needle above the cloth, to form the three' thread overseam stitch, in the well-known manner described in the Lindley and Taylor British Patent No. 215, January 25th, 1864. The two thread-carrying looper elements 5 and 6 are mounted upon or are formed on the upper ends of shanks lb and 7c, respectively, lying closely side by side in vertical planes (l ig. on the underside of the cloth plate A. These shanks'are both mounted upon the same pivot pin 4: ofa eranli arm 3 on a short crank shaft; 2, which is mounted in a bearing in the lower end of abracket B, secured to the underside of the bed plate. At the opposite end of this shaft 2 from the crank arm 3 is a crank arm 1, (Figs. 1 and 5) to which is pivotally connected with the usual ball joint 12 the connecting rod d (Fig. 5) with its strap embracing, and actuated by, the eccentric d on the main shaft a.

The oscillating movements imparted to the two looper shanks h and is through the crank shaft 2 are guided and controlled by links or, radius arms 7 and 8, respectively, swinging-on centers in the bracket B, so that the loopers 5 and 6 are caused to oscillate in two parallel planes diagonal to the line of the n'eedles movement (Fig. 5), the paths of trvel of these two loopers intersecting each other, as indiciteotin the diagram, Fig. 6. This diagram is taken aslooking at the parts as Figs. 1 to 4, Q. indicating the cloth, while 00 indicates the needle path, 3 indicates the path of looper 5, and .2 indicates the path of looper 6. I11 these drawings it has been thought best; for the sake'of clearness and simplicity to omit all illustration a 1 1 302cm v the loop carried by the looper and moves of the parts, of the machine not strictly permining. to the present invention, such as the feed motion, presser foot, take-ups and tensions, as they may be of any suitable con-. 5 struction. Illustrations of adaptable devices hereinbefore referred to.

From the foregoing explanations, it will be understood that' the three-thread stitch of that character are found in the patents is formed in the following manner, starting with the parts in the positions shown in Fig. 1 :-The needle 10 has descended through the cloth C andis beginning to rise a ain, and as it does so, it forms a loop 0 its'own 5 thread on the rear side of the needle, and

the hooked end of the looper 5 passes into this loop, as the looper moves-to the right,

as indicated in Fig. 2. As the looper continues to move to the right and upwardly in the curved path 3 Fig. 6-, it thrusts its own loop of thread 15v through the needle thread, and at the same time pulls the needle loop over toward the edge of the cloth, while the needle rises,-Fig. 3. At the same time .25 the looper 6 hasbeen traveling in the same into a position in front of the needle to carry that loop of the second looper over into the path ofthe now descending needle sit: 10, Fig. 4., so that'the needle'then carries its l thread down through that loop of the looper 6 and through the cloth to the position, Fig. 1, again, and soon.

We claim' as our invention- 1. In an overseam sewing machine, the 40 combination of a reciprocating eye-pointed needle with two loopers, means for reciprocating the loopers in parallel planes, diagonal to the line of the needles movement and separate radius rods pivotally connected to the respective loopers to control and guide their reciprocating movements intwo curved paths intersecting each other.

2. In an overseam sewin machine, ,the

combination of a reciprocating eye-po1nted'50 needle with two loopers, a common crank shaft to which the shanks of the two loopers are both connected, and two radius rods pivotally connected to the respective looper shanks to control and guide the travel of the loopers in two curved paths, intersecting each other. 3. In an oversealn sewing machine thecombination of a reciprocating eye-pointed needle with two thread-carrying loopers,

means for reciprocating the loopers in 'paral-' lel planes, diagonal to the line of the needles movement andseparate radius 'rods pivotally connected "to the respective loopers to control and guide their reciprocat ng movements in two curved paths intersecting each other to form a three-thread overseam.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses.

ARTHUR At MERRITT. GEORGE NOBLE.

Witnesses H. A. W. Harwano, Joun T. Cuaxsuaw. 

